Persist raster tile CRS metadata

backend/tests/test_raster_operations_service.py

@@ -606,6 +606,10 @@ def test_raster_tile_returns_manifest_payload(monkeypatch, tmp_path) -> None:
                 float(window.yoff + window.height),
             )
 
+    class FakeCRS:
+        def to_string(self):
+            return "EPSG:31370"
+
     class FakeSource:
         width = 10
         height = 10
@@ -614,6 +618,7 @@ def test_raster_tile_returns_manifest_payload(monkeypatch, tmp_path) -> None:
             self.profile = {"width": self.width, "height": self.height, "count": 1, "dtype": "uint8", "transform": None}
             self.transform = None
             self.nodata = 0
+            self.crs = FakeCRS()
 
         def read(self, *args, **kwargs):
             return FakeArray()
@@ -670,7 +675,10 @@ def test_raster_tile_returns_manifest_payload(monkeypatch, tmp_path) -> None:
     assert payload["manifest"]["overlap"] == 1
     assert payload["manifest"]["source_dataset_id"] == str(dataset_id)
     assert payload["manifest"]["source_raster_id"] == str(dataset_id)
+    assert payload["manifest"]["crs"] == "EPSG:31370"
+    assert payload["manifest"]["source_crs"] == "EPSG:31370"
     assert payload["manifest"]["count"] == payload["count"]
+    assert payload["manifest"]["tiles"][0]["crs"] == "EPSG:31370"
     assert payload["manifest"]["tiles"][0]["bounds"] == [0.0, 0.0, 4.0, 4.0]
     assert payload["manifest"]["ai_inference"] is False
     assert payload["manifest"]["tile_server"] is None